I have a small C# solution used to check users credentials. It works fine for two of my teammates, but on my PC I get an exception.
The relevant code:
PrincipalContext context = new PrincipalContext(ContextType.Domain);
if (context.ValidateCredentials(System.Environment.UserDomainName + "\\" + usr, pwd))
return true;
else
return false;
And the exception is:
DirectoryOperationException, "The server cannot handle directory requests.".
I tried creating context with the explicit server name and the 636 port number, but this didn't help as well.
Any ideas?
I had this problem too using IIS Express and VS 2010. What fixed it for me was a comment on another thread.
Validate a username and password against Active Directory?
but i'll save you the click and search... :) Just add ContextOpations.Negotiate to you Validate Credentials call like below.
bool valid = context.ValidateCredentials(user, pass, ***ContextOptions.Negotiate***);
I had this issue: things were working on my dev machine but didn't work on the server. Turned out that IIS on the server was set up to run as LocalMachine. I changed it to NetworkService (the default) and things started working.
So basically check the user of the app pool if this is running on IIS.
I had to just create a new app pool and assign it .NET 2.0, then assign the new app pool to our web app, and it started working. We had .NET 3.5 SP2, so the hotfix wasn't ideal for us. Since the WWW service is usually Local System, I questioned that too. But since it was .NET and security related, I gave a shot at the app pool first and it worked.
Perhaps you need the hotfix?
FIX: DirectoryOperationException exception
And you are an Admin or the id that your service is running under is an Admin on your PC right?
I take it you already looked into this:
System.DirectoryServices.Protocols
"You may receive a less than helpful DirectoryOperationException(“The server cannot handle directory requests.”) what isn’t quite so amusing about this is that it didn’t even try to communicate with the server. The solution was to add the port number to the server. So instead of passing “Server” to open the LdapConnection, I passed “server:636”. By the way, LDAPS is port 636 – rather than the 389 port used by LDAP."
Good point, I wouldn't expect that Win7/.NET 3.5 would need that patch. How about the info provided in this question:
Setting user's password via System.DirectoryServices.Protocols in AD 2008 R2
Related
Trying to connect to MySQL on my web host, using Connector/Net C#/WinForms in Visual Studio 2012 Update 3, but getting the below error message:
Authentication to host '1.1.1.1' for user 'username#mydomain.com' using method 'mysql_native_password' failed with message: Access denied for user 'username#mydomain.com'#'2.2.2.2' (using password: YES)
string connectionString = "SERVER=1.1.1.1;PORT=3306;DATABASE=databaseName;UID=username#mydomain.com;PASSWORD=mypassword;";
MySqlConnection connection = new MySqlConnection(connectionString);
connection.Open();
I am connecting remotely, have whitelisted my IP (and even temporary whitelisted all (%) to test), triple checked the username and password and IP.
I originally tried the username without the domain ( username rather than username#mydomain.com) but it gave me the below error:
Authentication with old password no longer supported, use 4.1 style passwords.
Any assistance would be much appreciated, thanks!
Its problem of 'Remote Database Access Hosts'.
"You can allow external web servers to access your MySQL databases by adding their domain name to the list of hosts that are able to access databases on your web site."
MySql access is not granted to IP address of the system at which application is running.(in your case its '2.2.2.2' ).
Note:- '2.2.2.2' is your public IP address.
Two possible things:
MySQL is case sensitive make sure that the case of Database= in your connection string matches with the actual database name
You may have to grant privileges to the user.
I hope this help you.
Check your application settings file (or wherever you have stored the connection string).
In my case the application was using the old connection string (which was not valid). I was assuming that the change I made in the code of the settings file is reflected to the designer (of the settings file). But it was not!
After creating a new user in MySQL, in MySQL Workbench "Test Connection" will succeed but the C# MySqlConnection.Open() will throw the same exception and message as the question (tested with localhost and 127.0.0.1 and the local ip address).
The reason is that MySqlConnection.Open() will somehow use SELECT privilege, and you need to at least enable the SELECT privilege for the new user. The error message is misleading.
This might be related to the case of specific Membership SQL Server based instructions on ASP.NET 4.5, workaround is to create new membership in web.config, drop mvc 4 AccountControler and use old from MVC3 more here or in the internet:
http://www.nsilverbullet.net/2012/11/06/using-mysql5-as-membership-backend-for-aspnet45-mvc4-application/
In my case updated password was not used. I just generated the password using Password Generator and copy it but forgot to click Change Password.
Also check the user is added to the database and has Privileges.
For me, using the actual IP address instead of the domain name solved the problem
While Whitelisting my Ip on cpanel i had accidentally put a space in there after my ip address.[Should have been handled by them]
I added the ip again and it worked.
In my case, the problem was misleading as well.
Had quite a few windows terminals running "the same" .net app all connecting to a remote MySQL server (installed in a windows server machine). However, only one always popping the specific error when anyone clicked to run the .net application. ODBC test connection passed successfully, and no matter if the error popped, when presing OK the application continued loading successfully finally and then worked fine.But again afterwards , when anyone tried to run in for the first time the message appeared. and I repeat only in this specific terminal! The fix finally came when I noticed, that it was only in this specific terminal with the problem that we had forgotten DHCP enabled! and "although it was given always the same IP" from our IT policies, however it only worked when we disabled DHCP and set this IP, SUBNET and GW, as fixed !
Check with a program like Navicat that the mysql server user has a native password. Everything is correct but if you are getting this error check the version of the link DLL
This error; Mysql.Data.dll and Mysql Server version mismatch error. Download and install an older version
https://downloads.mysql.com/archives/c-net/
Mysql Version < 4.5
Mysql.Data.Dll version= 6.0.3
We have 2 web-servers which are theoretically identical, but are producing different results when performing an AzMan authorisation check.
We have the same web-site running on both machines (literally the same web-site - it's been XCOPYed from one to the other, and it runs under the same service account). All this web-site does is perform an authorisation check against an AzMan database (sitting on a separate SQL server).
However, on the working web-site (WebA) this check returns 0 (i.e. "user is authorised"), while on the broken web-site (WebB) this check returns 5 (i.e. "user is NOT authorised"). We are expecting 0 on both web-sites. The same user is accessing both web-sites, from the same PC.
Does anyone have any ideas for things we can check?
Environment details
Windows Server 2008 R2
Same AD domain
IIS 7.5
.NET 3.5
AzMan Database runs on SQL Server 2005/Windows Server 2008 R2.
Code
AzAuthorizationStoreClass authStore = new AzAuthorizationStoreClass();
// initialise the store
authStore.Initialize(0, "mssql://Driver={SQL Server};Server={OURDBSERVER};Trusted_Connection={Yes};/OURDATABASE/OURAPPLICATION", null);
// open the store
IAzApplication2 authApp = authStore.OpenApplication2("OURAPPLICATION", null);
// get the identity of the user NOT the service account
WindowsIdentity identity = Thread.CurrentPrincipal.Identity as WindowsIdentity;
// and from that derive the token
ulong userToken = (ulong)identity.Token.ToInt64();
// get the context based on the token
IAzClientContext3 clientContext =
(IAzClientContext3)authApp.InitializeClientContextFromToken(userToken, null);
// get the operation object based on the id
IAzOperation2 azManOperation = (IAzOperation2)authApp.OpenOperation(operationId, null);
// generate an audit identifier
string auditIdentifer =
string.Format("{0}{1} : O:{2}", "{the_correct_id}", identity.Name, operationId);
uint accessResult = clientContext.AccessCheck2(auditIdentifer, string.Empty, azManOperation.OperationID);
return accessResult.ToString();
Many thanks,
RB.
Thanks to David Hall for pointing me in the right direction.
Investigation showed that both web-sites were enabled for both Windows authentication and anonymous access. However, on one web-site the user was being logged in correctly, while on the broken web-site it was falling back to anonymous mode.
Disabling anonymous access fixed this problem by ensuring the user logs in to both web-sites.
However, this leaves another question of why the browser logs in anonymously on one web-site but not the other - one for ServerFault I think.
In our case, we were using ASP.NET impersonation with Windows Authentication and not Anonymous. Tt was working on the Windows 7 Enterprise x64 Development machine and not on the Windows Server 2008 R2 x64 test server. Both Application Pools were set up exactly the same with the same domain account credentials.
It turns out that ASP.NET impersonation was the root cause of the issue. After disabling ASP.NET impersonation, the App Pool account was now being used as the credentials to connect to the AzMan store successfully. The same issue was occurring when connecting to an AzMan store in Active Directory or SQL Server.
For clarity, the error I was getting was: Value does not fall within the expected range. from AzAuthorizationStoreClass.Initialize()
My final connection string was:
<add name="AzPolicyStore" connectionString="mssql://Driver={SQL
Server};Server=sqlserver\instance;/DatabaseName/AzStore" />
I'm currently writing some software in C# which needs to connect to an AD server and get some user details. When I connect using the code below it works against most AD servers that I connect to but there are a couple where it fails with an error of "Logon failure: unknown user name or bad password.". The server name / credentials I'm using are definately correct as I've tested them with an LDAP Browser and the AD server is using standard security (port 389 etc). Can anyone offer any advice?
Cheers
Tim
DirectoryEntry d = new DirectoryEntry("LDAP://" + domain, admin_username, admin_password);
try
{
object x = d.NativeObject;
}
catch
{
throw;
}
I've had similar issues programming .net / AD in the past. One thing I found useful is using an LDAP viewer to see if I can connect to certain servers, etc. In this way, I can at least determine if it is a .NET error (perhaps my code), a credential error, etc.
I use the free/lite version of Softerra's LDAP viewer (http://www.ldapbrowser.com/download.htm) although I'm sure there are many others to choose from out there. If you try the one listed here, make sure to download the 'LDAP browser' and not 'LDAP Administrator'. The browser is the free one.
Try connecting to the same LDAP path you're having trouble with in code, using a LDAP browser/viewer. This will at least as step one determine if it is a .NET/code issue or not. If you can't connect via the browser, it can be helpful to play around with the connection options, such as port, domain (FQDN), etc.
Hope this might help narrow things down.
Active Directory allows at least three different logon name styles:
LDAP - i.e. LDAP DN. For example: cn=JohnS, ou=Users, dc=example, dc=com
NTLM. For example: EXAMPLE\JohnS
Kerberos principal name: For example: johns#example.com
However, you cannot login with just JohnS like you do with Windows box. It's a very common mistake.
Apologies in advance as I haven't had much experience with directories before.
I have an ASP.net application, and I have to validate its users against an Active Directory Application Mode instance running on Server 2k3. I was previously attempting a connection with DirectoryEntry and catching the COMException if the user's credentials (userPrincipalName & password) were wrong, but I had a number of problems when trying to bind as users who weren't a member of any ADAM groups (which is a requirement).
I recently found the System.DirectoryServices.AccountManagement library, which seems a lot more promising, but although it works on my local machine, I'm having some troubles when testing this in our testbed environment. Chances are I'm simply misunderstanding how to use these objects correctly, as I wasn't able to find any great documentation on the matter. Currently I am creating a PrincipalContext with a Windows username and password, then calling the AuthenticateCredentials with the user's userPrincipalName and password. Here's a very short exert of what I'm doing:
using (var serviceContext = new PrincipalContext(
ContextType.ApplicationDirectory,
serverAddress,
rootContainer,
ContextOptions.Negotiate | ContextOptions.SecureSocketLayer,
serviceAccountUsername,
serviceAccountPassword)) {
bool credentialsValid = serviceContext.ValidateCredentials(userID, password, ContextOptions.SecureSocketLayer | ContextOptions.SimpleBind)
}
If the user's credentials are valid, I then go on to perform other operations with that principal context. As I said, this works for both users with and without roles in my own environment, but not in our testbed environment. My old DirectoryEntry way of checking the user's credentials still works with the same configuration.
After a very long morning, I was able to figure out the problem!
The exception message I was receiving when calling ValidateCredentials was extremely vague. After installing Visual Studio 2008 in the test environment (which is on the other side of the country, mind you!), I was able to debug and retrieve the HRESULT of the error. After some very deep searching in to Google, I found some very vague comments about "SSL Warnings" being picked up as other exceptions, and that enabling "SCHANNEL logging" (which I'm very unfamiliar with!) might reveal some more insight. So, after switching that on in the registry and retrying the connection, I was presented with this:
The certificate received from the remote server does not contain the expected name. It is therefore not possible to determine whether we are connecting to the correct server. The server name we were expecting is ADAMServer. The SSL connection request has failed. The attached data contains the server certificate.
I found this rather strange, as the old method of connecting via SSL worked fine. In any case, my co-worker was able to spot the problem - the name on the SSL certificate that had been issued on the server was that of the DNS name ("adam2.net") and not the host name ("adamserver"). Although I'm told that's the norm, it just wasn't resolving the correct name when using PrincipalContext.
Long story short; re-issuing a certificate with the computer name and not the DNS name fixed the problem!
I receive an "Access Deined" COMException when I try to connect to a remote IIS 6 server from my C# application that is running under IIS 5.1.
Any ideas? I am experiencing all the same issues with the original questions.
Update - 4/1/09
I found this solution (http://www.codeproject.com/KB/cs/Start_Stop_IIS_Website.aspx) that consists of a window application connecting to an IIS server to start and stop web sites. I am able to run it on my workstation and connect to the IIS server.
Ugh....why can I run this stand alone application but not my ASP.NET application?
Original
I receive an "Access Denied" COMException when I try to connect to IIS from a remote machine using the DirectoryEntry.Exist method to check to see if the IIS server is valid.
string path = string.Format("IIS://{0}/W3SVC", server);
if(DirectoryEntry.Exist(path))
{
//do something is valid....
}
I am a member of an active directory group that has been added to the Administrators groups to the IIS server I am trying to connect to.
Has anyone experience this issue and know how to resolve it?
UPDATE:
#Kev - It is an ASP.NET application. Also, I can connect without an username and password to the remote server through IIS6 Manager.
#Chris - I am trying to connect to the remote server to display the number of virtual directorys and determine the .NET framework version of each directory. See this SO question.
#dautzenb - My ASP.NET application is running under IIS 5.1 trying to connect to an IIS 6 server. I can see fault audits in the security log for my local ASPNET account on the remote server. When I try to debug the application, I am running under my domain account and still get the Access is denied.
UPDATE 2:
#Kev - I was able to establish to create a DirectoryEntry object using the following overload:
public DirectoryEntry
(
string path,
string username,
string password
)
But, all of the properties contain a " threw an exception of type 'System.Runtime.InteropServices.COMException'" while I debug the app.
Also, the AuthenticationType property is set to Secure.
UPDATE 3:
The following two failure audit entries were in the remote IIS server's security event log every time I tried to establish a connection:
First event:
Event Category: Account Logon
Event ID: 680
Log attempt by: MICROSOFT_AUTHENTICATION_PACKAGE_V1_0
Logon account: ASPNET
Source Workstation:
Error Code: 0xC0000234
Second event:
Event Category: Logon/Logoff
Event ID: 529
Logon Failure:
Reason: Unknown user name or bad password
User Name: ASPNET
Domain: (MyDomain)
Logon Type: 3
Logon Process: NtLmSsp
Authentication Package: NTLM
Workstation Name: (MyWorkstationId)
Caller User Name: -
Caller Domain: -
Caller Logon ID: -
Caller Process ID: -
Transited Services: -
Source Network Address: 10.12.13.35
Source Port: 1708
Impersonation is set to true and the username and password are blank. It is using the ASPNET account on the remote IIS server.
If it is an identity problem, you could try setting your IIS 5.1 application to use Integrated Windows Authentication, and then add the following to you web.config on your IIS5.1 web site under system.web to enable impersonation.
<identity impersonate="true"/>
<authentication mode="Windows" />
Since this is an ASP.NET application, it runs in an Application Pool of IIS. This Application Pool runs using a specific user("Local System", "Network Service" or another user).
Does this user have enough rights to connect to a remote server ?
See MSDN for more info.
This looks like it may be a double-hop issue. If you are impersonating the current user of a website using NTLM, that impersonation is only valid on that server (your IIS 5.1 server in this case). If you try to connect to another server using the web site, you are actually going to have issues as it cannot pass the token to another server that was used during impersonation. The same is true if you are debugging your site through your machine, going to another box. Your local machine is authenticating you, but it cannot impersonate you to another server.
All of the solutions I have used in the past require you to hard code the app pool to use an account that has permissions, set the annony. account to a domain account with permissions on the other machine, or use a windows service running on the IIS 5.1 machine, under a domain account, to connect to the other server.
If you are using Kerberos, this wouldn't apply, but AD uses NTLM by default.
Where exactly are you trying to read too? Is it in under the same path as your application?
When I had this problem, I found that simply authenticating my self on a Windows file share solved the problem. From experience, I think that WMI/ADSI/COM doesn't have great support for not-already-authenticated users. I believe this issue occurs when you're not associated with a Windows domain.
If it is indeed a NTLM doublehop issue you could use the SETSPN utility to create service principal named instances for your target IIS servers.
Then you could go into Active Directory, and then allow the computer object (basically the NETWORK SERVICE or LOCAL SERVICE principals) to delegate its credentials to a correctly registered SPN.
Then you could hop-hop-hop all over the place! But, be warned! People can hurt themselves on sharp pointy things when you enable double-hop!
Good KB articles to read:
http://support.microsoft.com/kb/929650
I believe that DirectoryEntry.Exists silently ignores any credentials supplied and uses the creds of the authenticated user. This seems to match the behaviour you've described. For AD work, we never use it for this reason.
I'm sort of stumped at the moment as to why you can't get this working. There is a temporary work around you could try. When instantiating the DirectoryEntry object you could use one of the following constructor overloads:
public DirectoryEntry(
string path,
string username,
string password
)
Documented at: MSDN: DirectoryEntry Constructor (String, String, String)
...or...
public DirectoryEntry(
string path,
string username,
string password,
AuthenticationTypes authenticationType
)
Documented at: MSDN: DirectoryEntry Constructor (String, String, String, AuthenticationTypes)
As it happens I'm building a test AD environment on my virtual server box for a new project to do similar stuff. When I get it up and running I'll have a play around to see if I can reproduce the problem you're encountering. In the meantime let us know what happens if you try these constructor overloads referenced above.
Update (In answer to Michaels comment):
For reasons that evade me just now, we couldn't use DirectoryEntry.Exists() in a particular scenario, there is this snippet of code that gets called now and again in one of our apps:
public static bool MetabasePathExists(string metabasePath)
{
try
{
using(DirectoryEntry site = new DirectoryEntry(metabasePath))
{
if(site.Name != String.Empty)
{
return true;
}
return false;
}
}
catch(COMException ex)
{
if(ex.Message.StartsWith("The system cannot find the path specified"))
{
return false;
}
LogError(ex, String.Format("metabasePath={0}", metabasePath));
throw;
}
catch(Exception ex)
{
LogError(ex, String.Format("metabasePath={0}", metabasePath));
throw;
}
}
You could replace the constructor with one of the ones from above. Admittedly it's a stab in the dark :).